高温厌氧颗粒污泥膨胀床中颗粒污泥的性质分析

Properties of Anaerobic Granular Sludge in a Thermophilic Expanded Granular Sludge Bed Reactor

摘要:

考察了高温(55 ℃)条件下厌氧颗粒污泥膨胀床处理木薯酒精废水的运行特性和颗粒污泥的性质.结果表明，当进水有机负荷(OLR)在15.0 kg·m-3·d-1时，化学需氧量(COD)平均去除率为86.7%，平均产气量为15.1 L·d-1.OLR最高可达24.0 kg·m-3·d-1，COD平均去除率为88.5%，平均产气量为39.9 L·d-1.颗粒污泥的颗粒化率随着运行时间的延长逐渐增加，运行至260 d，直径大于2.00 mm的颗粒污泥约占32%.颗粒污泥的有机组分主要是碳、氢和氮，无机组分主要是硅、磷、钙和铁.颗粒污泥表面的微生物以丝状菌为主，污泥内核组成可能主要为磷酸钙或碳酸钙等无机质.

Abstract:

This study investigates the properties of thermophilic anaerobic granular sludge in an expanded granular sludge bed for cassava ethanol wastewater treatment.Experimental results show that the average chemical oxygen demand (COD) removal efficiency and the average gas production are 86.7% and 15.1 L·d-1,respectively,with the influent organic loading rate (OLR) being maintained at 15.0 kg·m-3·d-1.Moreover,the OLR can be increased up to 24.0 kg·m-3·d-1 with the average COD removal efficiency and the average gas production being 88.5% and 33.9 L·d-1,respectively.With the increase of operation time,the granular ratio of anaerobic sludge increases and the granular sludge with diameter greater than 2.00 mm is 32%.The organic components in granular sludge are mainly C,H and N,and the inorganic components were mainly Si,P,Ca and Fe.The bacillus bacteria are predominant in the acclimation thermophilic sludge and the inner core of sludge is probably composed by the compound of calcium phosphate or calcium carbonate.